Ecological prestressed flat pile

Abstract

An ecological prestressed flat pile comprises a pile body and a reinforcement cage pre-embedded in the pile body, a plurality of vertically exposed connecting ribs are arranged at the top of the pile body, the lower ends of the connecting ribs are fixed in the pile body, and the upper ends of the connecting ribs extend out of the top surface of the pile body to form exposed connecting sections which are used for forming rigid connection with a cast-in-place cap beam. The reinforcement cage comprises longitudinally extending prestressed main reinforcements and transversely arranged stirrups, the stirrups are arranged around the prestressed main reinforcements to form a space skeleton structure, and the connecting reinforcements are a plurality of deformed steel bars and are connected with the stirrups to form a rigid reinforcement mesh. A clamping area is formed when the pile body is prefabricated, a reinforcing steel plate is pre-buried in the clamping area, ecological holes penetrating through the two sides are formed in the side wall, a hoisting structure comprising a hoisting ring is arranged on the side portion, splicing structures matched with each other are arranged on the two sides respectively, a soil squeezing guide structure is formed in the bottom, and a soil squeezing groove penetrating to the bottom is formed in the side portion. Due to the fact that the exposed connecting rib is arranged on the top of the pile body and rigidly connected with the cast-in-place cap beam, pile top concrete does not need to be broken, construction efficiency is improved, and connection reliability is enhanced.

Description

Technical Field

[0001] This utility model belongs to the technical field of pile foundation engineering for various building structural systems, and specifically relates to an ecological prestressed flat plate pile. Background Technology

[0002] In the field of construction engineering, structures such as fences and protective walls are widely used in various scenarios such as municipal engineering and ecological protection. With the acceleration of urbanization and the deepening of ecological and environmental protection concepts, people have put forward higher requirements for the connection strength, construction efficiency, and ecological compatibility of steel cages in building construction.

[0003] Traditional construction of perimeter walls or protective walls requires breaking the top concrete after the piles are formed to expose the reinforcing steel, and then separately fabricating and fixing the cap beam using precast or cast-in-place methods. This process has significant drawbacks: breaking the concrete not only increases the demolition process but also generates a large amount of solid waste, which is discharged into rivers and causes pollution; while the separate fabrication of the cap beam requires additional steps, resulting in low construction efficiency.

[0004] The patent application No. 202022858333.1 (authorization publication No. CN215593863U), entitled "An Ecological Bank Protection Based on U-shaped Sheet Piles," attempts to avoid the concrete demolition process by connecting precast cap beams with pre-embedded threaded steel bars. However, the limiting block slot connection method used in this technology, when facing large lateral soil pressure, means that the pre-embedded threaded steel bars only bear the force through the contact point of the limiting block, which easily leads to stress concentration, deformation, and affects the overall structural stability. Furthermore, at the location of the ecological hole in the pile waist, there is no surrounding steel reinforcement structure. During pile driving, the soil squeezing stress can easily cause cracks in the steel bars around the hole, reducing the durability of the pile.

[0005] In summary, the existing process chain of "breaking concrete + split cap beam" suffers from multiple problems, including redundant procedures, solid waste pollution, and weak rebar connections. While related existing technologies have attempted improvements, they have failed to fundamentally resolve the contradiction between the reliability of rebar connections and construction efficiency. Therefore, how to achieve "concrete-free, rigid rebar connections, and efficient cap beam assembly" through structural innovation has become a critical technical bottleneck that urgently needs to be overcome in this field. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide an ecological prestressed flat plate pile that achieves a rigid connection between the cap beam and the pile body by pre-reserving exposed steel bars at the top of the pile body and casting them in place with the cap beam, without breaking the concrete.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an ecological prestressed flat plate pile, including a pile body made of concrete and a steel cage embedded in the pile body. The top of the pile body is provided with several vertically exposed connecting bars. The lower end of the connecting bars is fixed inside the pile body, and the upper end extends out of the top surface of the pile body to form an exposed connecting section for rigid connection with the cast-in-place cap beam.

[0008] In order to effectively manage the soil during the pile driving process, reduce the soil squeezing effect, and improve the pile driving efficiency, preferably, a soil squeezing groove is provided on the side of the pile body, extending to the bottom. The cross-section of the soil squeezing groove is semi-circular or semi-elliptical to form a continuous soil management structure.

[0009] To improve the integrity and load-bearing capacity of the reinforcing cage, preferably, the reinforcing cage includes prestressed main bars extending longitudinally along the pile body and stirrups arranged laterally. The prestressed main bars are steel bars or steel strands, and the stirrups are plain round bars or threaded bars. The stirrups are arranged around the prestressed main bars to form a spatial skeleton structure.

[0010] To further enhance the stability and collaborative performance of the connecting bars, preferably, the connecting bars are multiple threaded steel bars, which are distributed circumferentially along the top of the pile and welded or tied to the stirrups to form a rigid steel mesh.

[0011] To enhance the impact and vibration resistance of the pile body during pile driving and ensure the integrity of the pile body during construction, preferably, the pile body is prefabricated with a clamping area, and a reinforcing steel plate is pre-embedded in the clamping area to enhance the impact and vibration resistance during pile driving.

[0012] In order to promote soil and water exchange, create a suitable environment for aquatic organisms to live in, and improve ecological benefits, preferably, the side wall of the pile body is provided with ecological holes, which run through both sides of the pile body to form an ecological channel for soil and water exchange and for aquatic organisms to live in.

[0013] To facilitate pile hoisting operations and ensure the safety and reliability of the hoisting process, preferably, the pile body is provided with a hoisting structure on its side. The hoisting structure includes a lifting ring pre-embedded in the side wall of the pile body, and the lifting ring is made of round steel or galvanized steel.

[0014] To ensure a tight connection between adjacent piles and improve the overall stability and waterproofing / soil-retaining effect of the wall structure, preferably, the two sides of the pile are provided with mutually compatible grooves and ribs, and adjacent piles form a row of wall structures through the insertion and cooperation of the grooves and ribs.

[0015] In order to optimize the soil squeezing effect during pile driving, reduce pile driving resistance, and make the joint between adjacent piles more compact, preferably, the bottom of the pile body is formed with a soil squeezing chamfer or a soil squeezing rounded corner to guide the direction of soil squeezing during pile driving, thereby making the joint between adjacent piles more compact.

[0016] Compared with the prior art, the advantages of this utility model are as follows: By setting several vertically exposed connecting bars at the top of the pile body, and fixing the lower end of the connecting bars inside the pile body and extending the upper end out of the top surface of the pile body to form an exposed connecting section, this connecting section is used to form a rigid connection with the cast-in-place cap beam. Therefore, it is not necessary to break the top concrete to expose the reinforcing bars after the pile body is formed, which reduces the demolition process and solid waste generation, reduces the pollution of solid waste to the site, and improves construction efficiency. At the same time, the rigid connection between the cast-in-place cap beam and the pile body reinforcement enhances the reliability of the connection between the cap beam and the pile body, and solves the problems of weak connection of precast cap beam and complicated construction process in the prior art. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of this embodiment;

[0018] Figure 2 This is a schematic diagram of the distribution structure of the steel cage and reinforcing bars in this embodiment (side view);

[0019] Figure 3 This is a schematic diagram of the distribution structure of the steel cage and reinforcing bars in this embodiment (top view);

[0020] Figure 4 This is a schematic diagram of the hoisting structure in this embodiment;

[0021] Figure 5 This is a schematic diagram of the structure after multiple piles are spliced ​​together in this embodiment. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] Figures 1-5 The present invention is shown as the preferred embodiment. The specific implementation of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] The ecological prestressed flat plate pile in this embodiment mainly includes a pile body 1 made of concrete, a steel cage 2 embedded in the pile body 1, and connecting bars 3, etc.

[0025] The pile body 1 has several vertically exposed connecting bars 3 at its top. The lower end of the connecting bars 3 is fixed inside the pile body 1, and the upper end extends out of the top surface of the pile body 1 to form an exposed connecting section 3a, which is used to form a rigid connection with the cast-in-place cap beam. The pile body 1 has mutually compatible grooves 8 and protruding bars 9 on both sides. Adjacent pile bodies 1 form a row of wall structures through the insertion and connection of the grooves 8 and protruding bars 9. For specific splicing structures, please refer to [reference needed]. Figure 5 As shown.

[0026] The specific structure and connection relationships of each component are described below:

[0027] Pile 1 is the main structure of the ecological prestressed flat plate pile, refer to Figures 1 to 3 As shown, it is made of concrete and has a clamping area 4 formed during prefabrication for external equipment to grip and fix it. A reinforcing steel plate 5 is embedded in the clamping area 4 to enhance the impact and vibration resistance during pile driving.

[0028] An ecological hole 6 is provided on the side wall of the pile body 1, which runs through both sides of the pile body 1. The ecological hole 6 is used to form an ecological channel for water and soil exchange and for aquatic organisms to inhabit.

[0029] A lifting structure is provided on the side of pile body 1. This lifting structure includes lifting rings 7 pre-embedded in the side wall of pile body 1. See details. Figure 4 As shown, the lifting ring 7 is made of round steel or galvanized steel.

[0030] The bottom of the pile body 1 has a soil squeezing angle 10 or a soil squeezing rounded corner. The soil squeezing angle 10 or the soil squeezing rounded corner is used to guide the direction of soil squeezing during pile driving, so that the adjacent pile bodies 1 are spliced ​​more tightly. The figure shows the method of using the soil squeezing angle.

[0031] The side of the pile body 1 is also provided with a soil squeezing groove 11 that extends to the bottom. The cross-section of the soil squeezing groove 11 is semi-circular or semi-elliptical. The soil squeezing groove 11 is used to form a continuous soil drainage structure.

[0032] The reinforcing cage 2 includes prestressed main bars 2a extending longitudinally along the pile body 1 and stirrups 2b arranged transversely, as detailed in the reference. Figure 2 and Figure 3 As shown, the prestressed main reinforcement 2a can be made of steel bars or steel strands, and the stirrups 2b can be made of plain round steel bars or threaded steel bars. The stirrups 2b are arranged around the prestressed main reinforcement 2a to form a spatial skeleton structure. The connecting bars 3 can be multiple threaded steel bars, which are distributed circumferentially along the top of the pile body 1 and welded or tied to the stirrups 2b to form a rigid steel mesh.

[0033] The construction and working principle of the ecological prestressed flat plate pile in this embodiment are as follows:

[0034] During construction, the pile body 1 is precast first. A steel cage 2 and connecting bars 3 are pre-embedded inside the pile body 1. The lower end of the connecting bars 3 is fixed inside the pile body 1, and the upper end extends out of the top surface of the pile body 1 to form an exposed connecting section 3a, which is used to form a rigid connection with the cast-in-place cap beam. The steel cage 2 includes prestressed main bars 2a and stirrups 2b. A reinforcing steel plate 5 is pre-embedded in the clamping area 4. A lifting ring 7 is pre-embedded on the side of the pile body 1. Ecological holes 6, grooves 8, protruding bars 9, and soil displacement grooves 11 are also opened. Soil displacement chamfers 10 or soil displacement rounded corners are also formed at the bottom of the pile body 1.

[0035] After prefabrication, pile 1 is hoisted to the designated position using lifting ring 7, and then driven into the foundation using pile driving equipment. During the driving process, the soil squeezing angle 10 or soil squeezing rounded corner guides the direction of soil squeezing, and the soil squeezing groove 11 guides the soil, reducing the driving resistance. Adjacent piles 1 form a row of wall structures through the insertion and connection of groove 8 and protruding reinforcement 9. After the pile 1 is driven, the connecting reinforcement 3 at the top of the pile 1 forms a rigid connection with the cast-in-place cap beam, eliminating the need to break the concrete at the top of the pile 1, reducing demolition procedures and solid waste generation, improving construction efficiency, and enhancing the reliability of the connection between the cap beam and the pile 1.

[0036] It should be noted that in the description of this embodiment, the orientation or positional relationship of the terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. An ecological prestressed flat slab pile, comprising a pile body (1) made of concrete and a steel cage (2) pre-embedded in the pile body (1), characterized in that: The top of the pile body (1) is provided with several vertically exposed connecting bars (3). The lower end of the connecting bar (3) is fixed inside the pile body (1), and the upper end extends out of the top surface of the pile body (1) to form an exposed connecting section (3a) for rigid connection with the cast-in-place cap beam.

2. The ecological prestressed flat slab pile according to claim 1, characterized in that: The pile body (1) has a soil squeezing groove (11) extending to the bottom on its side. The cross-section of the soil squeezing groove (11) is semi-circular or semi-elliptical.

3. The ecological prestressed flat slab pile according to claim 1, characterized in that: The steel cage (2) includes prestressed main bars (2a) extending longitudinally along the pile body (1) and stirrups (2b) arranged laterally. The prestressed main bars (2a) are steel bars or steel strands, and the stirrups (2b) are plain round bars or threaded bars. The stirrups (2b) are arranged around the prestressed main bars (2a) to form a spatial skeleton structure.

4. The ecological prestressed flat slab pile according to claim 3, characterized in that: The connecting bar (3) consists of multiple threaded steel bars, which are distributed circumferentially along the top of the pile body (1) and are welded or tied to the stirrups (2b) to form a rigid steel mesh.

5. The ecological prestressed flat slab pile according to claim 1, characterized in that: The pile body (1) has a clamping area (4) formed during prefabrication, and a reinforcing steel plate (5) is pre-embedded in the clamping area (4) to enhance the impact and vibration resistance during pile driving.

6. The ecological prestressed flat plate pile according to claim 1, characterized in that: The pile body (1) has an ecological hole (6) on its side wall. The ecological hole (6) runs through both sides of the pile body (1) to form an ecological channel for water and soil exchange and for aquatic organisms to inhabit.

7. The ecological prestressed flat plate pile according to claim 1, characterized in that: The pile body (1) is provided with a hoisting structure on the side. The hoisting structure includes a lifting ring (7) pre-embedded in the side wall of the pile body (1). The lifting ring (7) is made of round steel or galvanized steel.

8. The ecological prestressed flat slab pile according to claim 1, characterized in that: The pile body (1) is provided with mutually compatible grooves (8) and ribs (9) on both sides. Adjacent pile bodies (1) form a row of wall structures through the insertion and cooperation of the grooves (8) and ribs (9).

9. The ecological prestressed flat plate pile according to claim 1, characterized in that: The bottom of the pile body (1) is formed with a soil squeezing chamfer (10) or a soil squeezing rounded corner to guide the direction of soil squeezing during pile driving.

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